Radial multiple-spindle drill



July 24, 192s. 1,677,999

J. J. BOAX ET AI. f

RADIAL MULTIPLE SPINDLE DRILL Filed Deo. 12. 1922 9 Sheets-Sheet l' July24, 1928. 1,677,999 J. J. BoAx ET AL 'RADIAL MULTIPLE SPINDLE DRILL July24, 192s. 1,677,999

J. J. BOAX ET AL RADIAL MULTIPL SPINDLE DRILL Filed Dec. l2. 1922 9Sheets-Sheet 3 July 24, 192s.

J. J. BOAX ET AL RADIAL MULTIPLE SPINDLE DRILL Filed Dec. 12. 1922y 9Sheets-Sheet 4 JNE.

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J. J. BOAX ET AL RADIAL MULTIPLE SPINDLE DRILL July 24, 1928.

Filed Deo. l2. 1922 9 Sheets-Sheet 5 July 24, 192s. 1,67 7.999

' J. J.` BOAX ET AL RADIAL MULTIPLE SPINDLE DRILL Filed Dec. 12. 1922 9Sheets-Sheet 6 J. J. BOAX ET AL RADIAL MULTIPLE SPINDLE DRILL July 24,192s.

Filed Dec. 12. 1922 9 Sheets-Sheet '7 L LT m M rt .W n

July 24, 1928. 1,677,999 J. J. BoAx E1' AL RADIAL MULTIPLE SPINDLE DRILLFiled Dec. 12. 1922 9 Sheets-Sheet 6 'July 24, 1928. 1,677,999

- J. J. aoAx ET AL RADIAL MULTIPLE SPINDLE Filed Dec. 12. 1922 9sneetsfsneet s ary/far@ Patented July 24, 1928.

narran STATES PATE-NT OFFICE.

JOI-IN vI. IBOAX, OF yMCKEESPORT; AND BORIS S. ROBINOFF, 0F PITTSBURGH,PENNSYL.

VANIA, ASSIGNORS T0 NATIONAL TUBE COMPANY, 0F PITTSBURGH, PENNSYL-VANIA, A CORPORATION OF NEW' JERSEY.

RADIAL MULTIPLE-SPINDLE DRILL.

Application iea :December 12, 1922. serial No. 606,464.

This invention relates tov drilling machines and more particularly to aradial multiple spindle drilling machine, and while not lim-` itedthereto, is particularly adapted for drill.- ing the ends of pipe in themaking of bump pints.

J The primary object of the invention is to provide a machine Aofthisclass which is provided with a plurality Vof drill heads adapted to be,independently adjusted at 'various angles radially around the work andalso at various angles to the vertical axis' of the work, so that thecenter lines of drills'carried by the head, when extended, willhmeet.

Another object is to provide a machine o f this class having noveloperating connections which will permit the various adjustments of thedrill heads to be made without ydisassembling any of `such connections.

A still further object is the provision of a machiney of this" classhaving the novel features, construction, and combination of partsdescribed in the followingspecification and illustrated in theaccompanying drawings.

In the drawings, Figure 1 is a side elevation of a machine constructedinaccordance with the invention. f l

Figure 2 is a plan view thereof partly in section.

Figure 8 is a sectional elevation showing the interior of the drivehousing.

Figure 4 is an enlarged top plan of one of and that thev pinion portion17 of the shaft the drill heads. l

Figure 5 is va typical longitudinal sectional elevation taken throughthe drill head of Figure 4.

Figure 6 is a. sectional elevation taken on the line VI-VI of Figure 5.

Figure 7 is a similar view on the line VII-VII of Figure 5.

Figure 8 is an enlarged sectional plan through the drive housing showingthe motor drive connections.

Figure 9 is an enlargedy typical sectional plan through the drivehousing.

Figure 1() is an enlarged typical sectional elevation through the drivehousing.

Referring more particularly to the di'awings, the numeraly Q'designatesthe base on which is mounted a vertical drill head sup# port 3 and drivehousing 4. r v

' The support 3 is providedwith an arcuate shari. ande piate portion onwhich a pla:

rality of drill' heads 6are slidably mounted.l

yThe drillrheads 6 comprise a base portion carrier, the bolt beingadapted to be screwed up against the ears 9 to lock the car-` A slee'vemember 14 `is slidably mounted lrier in position with relation to saidears. 4

within the spindle carrier 10 and is provided with a longitudinallyextending rack portion l5. A vertically disposed stub shaft member v16is journaled inthe carrier 10 land has its lower end provided with teethforming a pinion portion 17-which is in meshwith the rack portion 15 ofthe sleeve 14. A worm wheel 18 is loosely mounted adjacent'thc upperend'of the shaft' 16 and is adapted to be engaged rby a clutch member 19mounted on the upperend of the shaft 16 and adapted to be locked inoperative posit-ion by thumb-nut 20. A feed shaft 21 is journaled inlsuitable bearings 22 and 23 inthe l carrier 10 and is provided with aworm 24 which is in mesh with the worm wheel 18. It

' will be readily seen therefore that `when the 16 will travel alongthe' rack v15 of the sleeve 14, thus feeding the sleeve forward orback-A ward according to the direction'y of rotation.l

A drill spindle 26 is revolubly mounted within the sleeve 14 andv lockedagainst longitudinal'inovement relativethereto so as to be compelled tomove therewith. The forward end of the spindle 26 is provided with atapered recess27 for the reception of a drill. A pinion 28 is slidablymounted ron the extended yportion 29 of spindle 26 which projectsrearwardly from the sleeve 14, A st'ubedrive shaft 30 is journaled inthe kenlarged portion 31 of the spindle carrier and carries a pinion 32which meshes with the pinion 28 on the spindle26, and is adapted torotate said spindle. The base portion 7 of each drill head 6 is providedwith'flanges 83, adapted to contact with'the 'side edges of,VA the guideplate portion 5 of the support 3 lll' `Racks 39 and 40 are mounted onthe shoulders 37-38,respectively. A stud member i 41 is mounted in asuitable aperture in the base portion 7 of the drill heads and isprovided with an enlarged bearing portion 42 terminating at its upperend in a shoulder portion 43 adapted to bear against the under side ofthe base 7, and the lower end of said enlarged portion 42 terminates ina flange 44. The upper end of the stud member 41 is provided with locknuts 45 adapted to lock the stud against vertical movement.

A pinion 46 is mounted on the portion 42 of the stud and is supported bythe fiange 44, and is cut away to form a shoulder 47 for the support ofa ring pinion 48 which is secured thereto by pins, 49. The ring pinion48 is in meshwith the rack 39.

A second stud 51 is mounted in an aperture in the Vbase portion 7 of thedrillheads forward of the stud 41 and carries a pinion 5() which is inmesh with the pinion 46 and the second rack 40.

When it is desired to move the drill heads 6 along the guide plate 5 ofthe drill head support, the stud 41 is rotated. Rotation of the stud 41will rotate Jthe pinions 46, 48, and 50, and the pinions 48 and 50 willtravel along the racks 39 and 40, thereby moving the heads.

The drive housing 4 has a main drive shaft 52 and main feed shaft 53journaled therein. The main drive shaft 52 is adapted to receive itspower from-a motor 54 mounted on a motor stand 55 and connected by aflexible i coupling 56 to a stub shaft 57 journaled in bearing 58secured in the housingy 4, and provided with a beveled gear 59 whichmeshes with a beveled gear 60 on the drive shaft 52.

The main feed shaft 53 receives its power from a motor 61 mounted on amotor stand. 62 and connected by a flexible coupling 63 to a stub shaft64journaled in bearing 65 secured in the housing 4, and provided with aworm 66 which meshes with a worm wheel 67 on the feed shaft 53.

A plurality of sub-drive shafts 68 corresponding in number to the numberof drill heads 6 are positioned in the housing 4 at right angles to themain drive shaft 52, and

are journaled in suitable bearings 69 in the housing, and are providedintermediate their ends with a spiral toothed gear 70 which is meshedwith a second spiral toothed gear 71 on the main drive shaft 52. Theforward end of each of the sub-drive shafts 68 projects through theforward wall of the drive housing and is connected to a two-parttelescoping shaft 7 3 by-a universal coupling 74. lThe shafts 73 havetheir forward ends connected to the drive shafts 30 journaled in thedrill heads by universal couplings 75.

sponding in number to the number of drill heads 6, are positioned in thehousing 4 at right angles to the main feed shaft 53 and are journaled insuitable bearings 79 in the housing, and are provided intermediate theirends with a spiral toothed gear 8O which is meshed with a second spiraltoothed gear 81 on the main feed shaft 53. The forward end of each ofthe sub-feed shaftsv 78 projects through the forward wall of the drivehousing and is connected to a two-part telescoping shaft 83 byauniversal coupling 84. The shafts 83 have their forward ends connectedto the feed shaft 21 in the carrier 10 by universal couplings 85.Therefore, power from the main feed shaft is communicated' to the shaft21 and thence through the worm 24 and worin wheel 18 to the shaft 16 andpinion 17 to feed the sleeve 14 and spindle 26 forward or backwardrelative to they drill heads.

The above described machine is primarily designed for drilling rivetreceiving apertures in the periphery of bump joints of large diameterpipe. Therefore, assuming that such an operation is to be performed, theoperation of the machine will be as follows- The drill heads 6 will beadjustd alcng the guide plate 5 of the support 4 in order to positionthem radially around the work, and then the spindle carriers 10 will beadjusted around the pivot 11 in order to posi--y tion the drills on theproper angle. It will be noted th at due to the universal connections ofthe shafts 73 and 83, and the fact that these shafts are extensible, theheads 6 are free to be adjusted without interfering with their driveconnections. l

After the proper adjustments are made, the motors 54 and 61 are operatedto furnish power to the main drive shaft 52 and main feed shaft 53. Theseveral sub-drive shafts 68 and sub-feed shafts 78'being geared to themain drive and feed shafts, respectively,

will all be operated simultaneously, and due to their positiveconnections with the shafts and 21 in the drill heads will cause asimultaneous drive and feed of the drill spindle 26. f

When it is desired for any reason to prevent the drill-spindle in anyone of the heads 6 from being fed into the work, the clutch member 19may be renderedinoperative by loosening the thumb-nut 20, thuspermitting said clutch member to move away from and out of engagementwith the worm wheel 18 and thereby causing said wheel to rotate freelyon the shaft 16.

While we have described and illustrated only one embodiment of ourinvention, it will be understood that we do not wish to be limited tothe exact constructions illustrated, since various modifications may bemade in design, construction, and combination of parts without departingfrom the scope of this invention as defined in the appended claims.

drill driving means including longitudinally expansible shafts forconnecting the said drill driving means and also including means topermit individual adjustment of the drill-heads along thek arcuateguideway without interfering with the drill driving means.

2. A radial multiple spindle drilling machine, comprising an uprightdrill-head support provided with an upright arcuate guideway, an uprightseries of drill-heads mounted on said guideway and adjustable along saidguideway relative to each other, drill spindles mounted for endwise feedand rotary drive movements on said drill-heads, in combination with anupright housing separate from and in rear of said support, an uprightmain feed shaft in said housing, a motor geared to said feed shaft, anupright series of substantially horizontal sub-feed shafts in saidhousing and geared to said main feed shaft, and drill feeding meansincluding longitudinally eXpansible shafts for connecting the sub-feedshafts with the respective drill spindles to feed the latter endwise,said drill feeding means also including means to permit arcuateadjustment of the drill-heads without interfering with the drill-feedingmeans. d

' 3. A radial multiple spindle drilling machine, comprising an uprightdrill-head support provided withl an upright arcuate guideway, `anupright series of drill-heads mounted on said guideway and adjustablealong said guideway relative to each other, sleeve members mounted onsaid heads and movable endwise thereon, drill spindles revolvablymounted in said sleeve members to move longitudinally therewith, a rackon each of said sleeve members, pinions mounted on the drill-heads andin mesh with the racks to move said sleeve members endwise, an uprighthousing separate from and in rear of the support, an upright feed shaftwithin the housing, a motor geared to said feed shaft, an upright seriesof substantially' horizontal sub-feed shafts in said housing and gearedto the main feed shaft, drill feedingmeans extending between the subfeedshafts and the respective pinions including longitudinally expansibleshafts and i universal joints to permit arcuate adjustment of thedrill-heads without interfering with the drill feeding means.

4. A radial multiple spindle drilling machine, comprising an uprightdrill-head support provided with an upright arcuate guideway, an uprightseries of drill-heads mounted on said guideway and adjustable along saidguideway relative to each other, a spindle carrier mounted on each ofsaid drill-heads and pivotally adjustable in a plane at right angles tothat of the arcuate guideway, a sleeve member mounted on each of saidspindle carriers and movable endwise thereon, drill spindlesv revolvablymounted in said sleeve -members and movable therewith, feeding means forfeeding the sleeves and spindles to and from the work, and driving meansfor rotatably operating the said spindles, the feeding means and thedriving means each including means to permit adjustment of thedrill-heads and the spindle carriers without interfering with thefeeding means and the driven means.

In' testimony whereof we have hereunto signed our names.

JOHN J. BOAX. BORIS S. ROBINOFF.

